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1
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0000359232
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Constituents of Laurencia
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Scheuer, P. J, Ed, Academic Press: New York
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(a) Erickson, K. L. Constituents of Laurencia. In Marine Natural Products: Chemical and Biological Perspectives; Scheuer, P. J., Ed.; Academic Press: New York, 1983; Vol. V, pp 131-257.
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(1983)
Marine Natural Products: Chemical and Biological Perspectives
, vol.5
, pp. 131-257
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Erickson, K.L.1
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2
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4444383918
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(b) Dorta, A.; Diaz-Marrero, A. R.; Cueto, M.; D'Croz, L.; Maté, J. L.; Darias, J. Tetrahedron Lett. 2004, 45, 7065-7068.
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(2004)
Tetrahedron Lett
, vol.45
, pp. 7065-7068
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Dorta, A.1
Diaz-Marrero, A.R.2
Cueto, M.3
D'Croz, L.4
Maté, J.L.5
Darias, J.6
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3
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0002069261
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Originally isolated from the marine alga Laurencia elata: Sims, J. J.; Lin, G. H. Y.; Wing, R. M. Tetrahedron Lett. 1974, 15, 3487-3490.
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Originally isolated from the marine alga Laurencia elata: Sims, J. J.; Lin, G. H. Y.; Wing, R. M. Tetrahedron Lett. 1974, 15, 3487-3490.
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5
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0030484574
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(b) de Nys, R.; Leya, T.; Maximilien, R.; Afsar, A.; Nair, P. S. R.; Steinberg, P. D. Biofouling 1996, 10, 213-224.
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(1996)
Biofouling
, vol.10
, pp. 213-224
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de Nys, R.1
Leya, T.2
Maximilien, R.3
Afsar, A.4
Nair, P.S.R.5
Steinberg, P.D.6
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6
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0001512087
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(c) Martín, J. D.; Pérez, C.; Ravelo, J. L. J. Am. Chem. Soc. 1986, 108, 7801-7811.
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(1986)
J. Am. Chem. Soc
, vol.108
, pp. 7801-7811
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Martín, J.D.1
Pérez, C.2
Ravelo, J.L.3
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7
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0035801683
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(d) Vairappan, C. S.; Daitoh, M.; Suzuki, M.; Abe, T.; Masuda, M. Phytochemistry 2001, 58, 291-297.
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(2001)
Phytochemistry
, vol.58
, pp. 291-297
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Vairappan, C.S.1
Daitoh, M.2
Suzuki, M.3
Abe, T.4
Masuda, M.5
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10
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29044446620
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50 = 2.4 mM (lag phase), 2.0 mM (log phase); Dias, T.; Brito, I.; Moujir, L.; Paiz, N.; Darias, J.; Cueto, M. J. Nat. Prod. 2005, 68, 1677-1679.
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50 = 2.4 mM (lag phase), 2.0 mM (log phase); Dias, T.; Brito, I.; Moujir, L.; Paiz, N.; Darias, J.; Cueto, M. J. Nat. Prod. 2005, 68, 1677-1679.
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11
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0002885728
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For the preparation of elatol (1) via the degradation of iso-obtusol, see: (a) González, A. G.; Darias, J.; Díaz, A.; Fourneron, J. D.; Martín, J. D.; Pérez, C. Tetrahedron Lett. 1976, 17, 3051-3054.
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For the preparation of elatol (1) via the degradation of iso-obtusol, see: (a) González, A. G.; Darias, J.; Díaz, A.; Fourneron, J. D.; Martín, J. D.; Pérez, C. Tetrahedron Lett. 1976, 17, 3051-3054.
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12
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7344240861
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(b) González, A. G.; Martín, J. D.; Martín, V. S.; Martínez-Ripoll, M.; Fayos, J. Tetrahedron Lett. 1979, 20, 2717-2718.
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(1979)
Tetrahedron Lett
, vol.20
, pp. 2717-2718
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González, A.G.1
Martín, J.D.2
Martín, V.S.3
Martínez-Ripoll, M.4
Fayos, J.5
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13
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14644410237
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(c) González, A. G.; Martín, J. D.; Martín, V. S.; Norte, M.; Pérez, R. Tetrahedron Lett. 1982, 23, 2395-2398.
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(1982)
Tetrahedron Lett
, vol.23
, pp. 2395-2398
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González, A.G.1
Martín, J.D.2
Martín, V.S.3
Norte, M.4
Pérez, R.5
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14
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34249821956
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For lead references on the total syntheses of other chamigrene natural products, see: a
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For lead references on the total syntheses of other chamigrene natural products, see: (a) Taber, D. F.; Sikkander, M. I.; Storck, P. H. J. Org. Chem. 2007, 72, 4098-4101.
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(2007)
J. Org. Chem
, vol.72
, pp. 4098-4101
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Taber, D.F.1
Sikkander, M.I.2
Storck, P.H.3
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15
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33344467238
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(b) Srikrishna, A.; Lakshmi, B. V.; Mathews, M. Tetrahedron Lett. 2006, 47, 2103-2106.
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(2006)
Tetrahedron Lett
, vol.47
, pp. 2103-2106
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Srikrishna, A.1
Lakshmi, B.V.2
Mathews, M.3
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16
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0030272517
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(c) Chen, Y.-J.; Wang, C.-Y.; Lin, W.-Y. Tetrahedron 1996, 52, 13181-13188.
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(1996)
Tetrahedron
, vol.52
, pp. 13181-13188
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Chen, Y.-J.1
Wang, C.-Y.2
Lin, W.-Y.3
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17
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0028019875
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Hatsui, T, Wang, J.-J, Takeshita, H. Bull. Chem. Soc. Jpn. 1994, 67, 2507-2513. Also see ref 3c
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(d) Hatsui, T.; Wang, J.-J.; Takeshita, H. Bull. Chem. Soc. Jpn. 1994, 67, 2507-2513. Also see ref 3c.
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19
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27544451620
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(b) Mohr, J. T.; Behenna, D. C.; Harned, A. M.; Stoltz, B. M. Angew. Chem., Int. Ed. 2005, 44, 6924-6927.
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(2005)
Angew. Chem., Int. Ed
, vol.44
, pp. 6924-6927
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Mohr, J.T.1
Behenna, D.C.2
Harned, A.M.3
Stoltz, B.M.4
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20
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34247487884
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Stewart, I. C.; Ung, T.; Pletnev, A. A.; Berlin, J. M.; Grubbs, R. H.; Schrodi, Y. Org. Lett. 2007, 9, 1589-1592.
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(2007)
Org. Lett
, vol.9
, pp. 1589-1592
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Stewart, I.C.1
Ung, T.2
Pletnev, A.A.3
Berlin, J.M.4
Grubbs, R.H.5
Schrodi, Y.6
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21
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0141854289
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For the preparation of trisubstituted chloroalkenes via RCM, see: a
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For the preparation of trisubstituted chloroalkenes via RCM, see: (a) Chao, W.; Weinreb, S. M. Org. Lett. 2003, 5, 2505-2507.
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(2003)
Org. Lett
, vol.5
, pp. 2505-2507
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Chao, W.1
Weinreb, S.M.2
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23
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0742287247
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For the preparation of a fully substituted vinyl fluoride via RCM, see: c
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For the preparation of a fully substituted vinyl fluoride via RCM, see: (c) Marhold, M.; Buer, A.; Hiemstra, H.; van Maarseveen, J. H.; Haute, G. Tetrahedron Lett. 2004, 45, 57-60.
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(2004)
Tetrahedron Lett
, vol.45
, pp. 57-60
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Marhold, M.1
Buer, A.2
Hiemstra, H.3
van Maarseveen, J.H.4
Haute, G.5
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24
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33746191949
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Trost has recently reported the use of vinylogous ester and thioester derivatives in enantioselective decarboxylative allylation using a chiral bis(phosphine)-Pd(0) complex: Trost, B. M, Bream, R. N, Xu, J. Angew. Chem, Int. Ed. 2006, 45, 3109-3112
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Trost has recently reported the use of vinylogous ester and thioester derivatives in enantioselective decarboxylative allylation using a chiral bis(phosphine)-Pd(0) complex: Trost, B. M.; Bream, R. N.; Xu, J. Angew. Chem., Int. Ed. 2006, 45, 3109-3112.
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26
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38349114522
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2 led to significantly less conversion.
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2 led to significantly less conversion.
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27
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38349177183
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For convenience, the enantioselective allylation reaction with 13 was optimized in the opposite enantiomeric series.
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For convenience, the enantioselective allylation reaction with 13 was optimized in the opposite enantiomeric series.
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28
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33748361789
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Mohr, J. T.; Nishimata, T.; Behenna, D. C.; Stoltz, B. M. J. Am. Chem. Soc. 2006, 128, 11348-11349.
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(2006)
J. Am. Chem. Soc
, vol.128
, pp. 11348-11349
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Mohr, J.T.1
Nishimata, T.2
Behenna, D.C.3
Stoltz, B.M.4
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29
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38349086715
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A separate experiment revealed no reactivity in the absence of a Pd(0) catalyst.
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A separate experiment revealed no reactivity in the absence of a Pd(0) catalyst.
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30
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34547164363
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For preliminary results on the rate acceleration of enantioselective decarboxylative allylation of enol carbonates with electron-deficient PHOX ligands, see: Tani, K, Behenna, D. C, McFadden, R. M, Stoltz, B. M. Org. Lett. 2007, 9, 2529-2531
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For preliminary results on the rate acceleration of enantioselective decarboxylative allylation of enol carbonates with electron-deficient PHOX ligands, see: Tani, K.; Behenna, D. C.; McFadden, R. M.; Stoltz, B. M. Org. Lett. 2007, 9, 2529-2531.
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31
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38349088393
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1H NMR .
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1H NMR .
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32
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0001031005
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For the isolation of laurencenone B (7) from the marine alga Laurencia obtusa, see: Kennedy, D. J.; Selby, I. A.; Thomson, R. H. Phytochemistry 1988, 27, 1761-1766. Neither the absolute configuration nor the optical rotation was specified.
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(a) For the isolation of laurencenone B (7) from the marine alga Laurencia obtusa, see: Kennedy, D. J.; Selby, I. A.; Thomson, R. H. Phytochemistry 1988, 27, 1761-1766. Neither the absolute configuration nor the optical rotation was specified.
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33
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0001654357
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For the preparation of (+)-laurencenone B ((+)-7) via the degradation of elatof (1), see: Brennan, M. R.; Erickson, K. L; Minott, D. A.; Pascoe, K. O. Phytochemistry 1987, 26, 1053-1057.
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(b) For the preparation of (+)-laurencenone B ((+)-7) via the degradation of elatof (1), see: Brennan, M. R.; Erickson, K. L; Minott, D. A.; Pascoe, K. O. Phytochemistry 1987, 26, 1053-1057.
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34
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38349092451
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11C NMR data for semisynthetic (+)-laurencenone B ((+)-7) (ref 17b) matched that of our synthetic material. See the supporting information for a detailed comparison.
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11C NMR data for semisynthetic (+)-laurencenone B ((+)-7) (ref 17b) matched that of our synthetic material. See the supporting information for a detailed comparison.
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35
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38349167599
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Purification of α-bromoketone 10 was hampered by its poor stability to silica gel and reverse phase HPLC.
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Purification of α-bromoketone 10 was hampered by its poor stability to silica gel and reverse phase HPLC.
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36
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38349168197
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Determined by quenching the reaction at -78°C in a separate run, resulting in the isolation a 3.9:1 mixture of alcohol diastereomers favoring i. (Chemical Equation Presented)
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Determined by quenching the reaction at -78°C in a separate run, resulting in the isolation a 3.9:1 mixture of alcohol diastereomers favoring i. (Chemical Equation Presented)
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37
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38349133076
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D value for the synthetic material would be +95.5°, which differed from the observed value by 3.6%.
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D value for the synthetic material would be +95.5°, which differed from the observed value by 3.6%.
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